Grams to Kilograms (g to kg) Converter

Grams to Kilograms Conversion

Grams and kilograms are both metric units, so conversion is straightforward: 1 kilogram equals exactly 1000 grams. This converter gives quick answers for cooking, nutrition, and shipping.

Conversion formula: 1 kg = 1000 g — divide grams by 1000.

When You Need This

Nutrition tracking — daily intake often in grams
Recipe scaling — converting between serving sizes
Grocery shopping — comparing prices per kg
Shipping packages — weight limits often in kg
Medication dosing — doses in mg, body weight in kg
Sports nutrition — protein goals per kg bodyweight

How to Convert

The Conversion Formula

Since both are metric, 1 kg = 1000 g exactly. Divide grams by 1000 to get kilograms, or simply move the decimal point three places to the left.

kilograms = grams ÷ 1000 — for example, 1500 g ÷ 1000 = 1.5 kg.

Using the Tool

Enter the value

Type the amount you want to convert into the input field.

Read the result instantly

The converted value appears immediately in the second field — no button to press.

Swap or pick any unit

Press the swap button to reverse direction, or open a dropdown to choose a different unit.

Copy the result

Tap the copy icon next to either field to copy the value for your records.

Worked Examples

Grams	Calculation	Kilograms
500 g	`500 ÷ 1000`	0.5 kg
1000 g	`1000 ÷ 1000`	1 kg
1500 g	`1500 ÷ 1000`	1.5 kg
2500 g	`2500 ÷ 1000`	2.5 kg

Features & Use Cases

Tool Capabilities

Instant Two-Way Conversion

Results update as you type. Use the swap button to reverse the direction in one click.

Any Unit, Any Pair

Searchable dropdowns let you switch to grams, ounces, pounds, stone, tons, carats and more — not just the default pair.

Copy & Quick Reference

Copy either value with one tap, and check the built-in reference table for common conversions at a glance.

Common Use Cases

Nutrition & Diet

Track macronutrients in grams while relating them to body weight in kilograms. Athletes often calculate needs as grams per kg.

Grocery Shopping

Prices per kg help compare products of different sizes. Convert the gram weight on packages to kg for a fair comparison.

Cooking & Recipes

Scale recipes up or down by switching between grams for small amounts and kilograms for bulk ingredients.

Package Shipping

Shipping rates use kilogram brackets. Know whether your 800 g package falls under 1 kg or needs the next rate tier.

Runs in your browser: All calculations happen locally on your device. Nothing is uploaded — fast and private.

Frequently Asked Questions

How many grams are in a kilogram?

Exactly 1000 grams = 1 kilogram. The prefix "kilo" means 1000 in the metric system.

How do I convert 750 grams to kilograms?

Divide by 1000: 750 ÷ 1000 = 0.75 kg. Or move the decimal three places to the left.

Why are some products labeled in grams and others in kg?

Smaller items (under 1 kg) usually show grams for clarity; larger items show kilograms. Many products display both.

What is the difference between mass and weight?

Technically, kilograms measure mass, not weight (a force). In everyday use and in this converter, the terms are interchangeable.

How many grams of protein per kg of body weight?

General guidance: 0.8 g/kg for sedentary adults, 1.2–1.6 g/kg for active people, and 1.6–2.2 g/kg for athletes building muscle.

Is 500 g the same as half a kilogram?

Yes, exactly. 500 g = 0.5 kg. Common package sizes follow this pattern: 250 g, 500 g, 750 g, 1000 g.

Grams to Kilograms